求翻译：海豚能发出180千赫的超声波，也能听到并分辨这样高的超声波，频率越高分辨率也越高。海豚利用其灵敏度很高的“声纳”能精确地辨别方位，测定水深，识别海底性质、沉没物体的大小和性质，测量离岸距离，并能分出鱼、软体动物、甲壳类等各种食物。它能在蒙住眼的情况下在同样大小的玻璃、塑料、铝和铜板中把铜板找出来，它还能识别装在粗麻布袋里的各种几何图形，甚至把活塞装在金属筒里，它能探测出活塞在里面的不同状态，知道它是横躺着，还是斜歪着等。是什么意思？

The dolphins can be issued a 180-kHz ultrasound, can be heard and to distinguish such a high ultrasonic higher, the higher the frequency resolution. Dolphins use high sensitivity "sonar" can accurately identify the position determination of the depth, identify the seabed nature, the sinking of the s

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The porpoise can send out 180 kilohertz ultrasonic waves, also can hear and distinguish the such high ultrasonic wave, a frequency higher resolution is also higher.The porpoise uses its sensitivity very high “the sound navigation and ranging” to be able to distinguish the position precisely, the det

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